//
//  WBVisitorView.swift
//  飞哥微博
//
//  Created by gary.liu on 17/1/2.
//  Copyright © 2017年 gary.liu. All rights reserved.
//

import UIKit

class WBVisitorView: UIView {

    /// 注册按钮
    lazy var registerBtn:UIButton = UIButton.cz_textButton(
        "注册",
        fontSize: 16,
        normalColor: UIColor.orange,
        highlightedColor: UIColor.black,
        backgroundImageName: "common_button_white_disable")
    /// 登录按钮
    lazy var loginBtn:UIButton = UIButton.cz_textButton(
        "登录",
        fontSize: 16,
        normalColor: UIColor.darkGray,
        highlightedColor: UIColor.black,
        backgroundImageName: "common_button_white_disable")
    /// 访客视图的信息字典 [ImageName / message]
    /// 如果是首页， imageName == ""
    var visitorInfo: [String : String]? {
        didSet {
            // 1. 取字典信息
            guard let imageName = visitorInfo?["imageName"] else {
                return
            }
            guard let message = visitorInfo?["message"] else {
                return
            }
            // 设置信息
            tipLab.text = message
            
            // 设置图像，首页不需要图像
            if imageName == "" {
                startAnimation()
                return
            }
            iconView.image = UIImage(named:imageName)
            
            // 其他的控制器的访客视图不需要显示小房子/遮罩视图
            houseIconView.isHidden = true
            maskIconView.isHidden = true
        }
    }
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        
        setupUI()
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    /// 旋转图标动画(首页)
    fileprivate func startAnimation() {
        
        let anim = CABasicAnimation(keyPath: "transform.rotation")
        
        anim.toValue = 2 * M_PI
        anim.repeatCount = MAXFLOAT
        anim.duration = 15
        // 动画完成不删除， 如果 iconView 被释放， 动画会一起销毁！
        // 在设置连续比方的动画非常有用
        anim.isRemovedOnCompletion = false
        
        // 将动画添加到图层
        iconView.layer.add(anim, forKey: nil)
    }
    
    // MARK: - 私有控件
    /// 懒加载属性只有调用 UIKit 控件的指定构造函数，其他都需要使用类型
    /// 图像视图
    fileprivate lazy var iconView:UIImageView = UIImageView(image: UIImage(named: "visitordiscover_feed_image_smallicon"))
    /// 遮罩图像
    fileprivate lazy var maskIconView:UIImageView = UIImageView(image: UIImage(named: "visitordiscover_feed_mask_smallicon"))
    /// 小房子
    fileprivate lazy var houseIconView:UIImageView = UIImageView(image: UIImage(named: "visitordiscover_feed_image_house"))
    /// 提示标签
    fileprivate lazy var tipLab:UILabel = UILabel.cz_label(
        withText: "关注一些人，回这里看看有什么惊喜关注一些人，回这里看看有神惊喜",
        fontSize: 14,
        color: UIColor.darkGray)
    
}

// MARK: - 设置界面
extension WBVisitorView {
    
    fileprivate func setupUI() {
        // 在开发的时候，如果能够使用颜色，就不要使用图像，效率高
        backgroundColor = UIColor.cz_color(withHex: 0xededed)
        
        // 1. 添加控件
        addSubview(iconView)
        addSubview(maskIconView)
        addSubview(houseIconView)
        addSubview(tipLab)
        addSubview(registerBtn)
        addSubview(loginBtn)
        
        // 文本居中
        tipLab.textAlignment = .center
        
        // 2. 取消 autoresizing
        for view in subviews {
            view.translatesAutoresizingMaskIntoConstraints = false
        }
        
        // 3. 自动布局
        let margin:CGFloat = 20.0
        /// 图像视图
        addConstraint(NSLayoutConstraint(item: iconView,
                                         attribute: .centerX,
                                         relatedBy: .equal,
                                         toItem: self,
                                         attribute: .centerX,
                                         multiplier: 1.0,
                                         constant: 0))
        
        addConstraint(NSLayoutConstraint(item: iconView,
                                         attribute: .centerY,
                                         relatedBy: .equal,
                                         toItem: self,
                                         attribute: .centerY,
                                         multiplier: 1.0,
                                         constant: 0))
        /// 小房子
        addConstraint(NSLayoutConstraint(item: houseIconView,
                                         attribute: .centerX,
                                         relatedBy: .equal,
                                         toItem: iconView,
                                         attribute: .centerX,
                                         multiplier: 1.0,
                                         constant: 0))
        
        addConstraint(NSLayoutConstraint(item: houseIconView,
                                         attribute: .centerY,
                                         relatedBy: .equal,
                                         toItem: iconView,
                                         attribute: .centerY,
                                         multiplier: 1.0,
                                         constant: 0))
        /// 提示标签
        addConstraint(NSLayoutConstraint(item: tipLab,
                                         attribute: .centerX,
                                         relatedBy: .equal,
                                         toItem: iconView,
                                         attribute: .centerX,
                                         multiplier: 1.0,
                                         constant: 0))
        addConstraint(NSLayoutConstraint(item: tipLab,
                                         attribute: .top,
                                         relatedBy: .equal,
                                         toItem: iconView,
                                         attribute: .bottom,
                                         multiplier: 1.0,
                                         constant: margin))
        addConstraint(NSLayoutConstraint(item: tipLab,
                                         attribute: .width,
                                         relatedBy: .equal,
                                         toItem: nil,
                                         attribute: .notAnAttribute,
                                         multiplier: 1.0,
                                         constant: 236))
        /// 注册按钮
        addConstraint(NSLayoutConstraint(item: registerBtn,
                                         attribute: .left,
                                         relatedBy: .equal,
                                         toItem: tipLab,
                                         attribute: .left,
                                         multiplier: 1.0,
                                         constant: 0))
        addConstraint(NSLayoutConstraint(item: registerBtn,
                                         attribute: .top,
                                         relatedBy: .equal,
                                         toItem: tipLab,
                                         attribute: .bottom,
                                         multiplier: 1.0,
                                         constant: margin))
        addConstraint(NSLayoutConstraint(item: registerBtn,
                                         attribute: .width,
                                         relatedBy: .equal,
                                         toItem: nil,
                                         attribute: .notAnAttribute,
                                         multiplier: 1.0,
                                         constant: 100))
        /// 登录按钮
        addConstraint(NSLayoutConstraint(item: loginBtn,
                                         attribute: .right,
                                         relatedBy: .equal,
                                         toItem: tipLab,
                                         attribute: .right,
                                         multiplier: 1.0,
                                         constant: 0))
        addConstraint(NSLayoutConstraint(item: loginBtn,
                                         attribute: .top,
                                         relatedBy: .equal,
                                         toItem: tipLab,
                                         attribute: .bottom,
                                         multiplier: 1.0,
                                         constant: margin))
        addConstraint(NSLayoutConstraint(item: loginBtn,
                                         attribute: .width,
                                         relatedBy: .equal,
                                         toItem: registerBtn,
                                         attribute: .width,
                                         multiplier: 1.0,
                                         constant: 0))
        /// 遮罩图像
        // views: 定义 VFL 中的控件控件和实际名称映射关系
        // metrics: 定义 VFL 中 （） 指定的常数值映射关系
        let viewDict = ["maskIconView" : maskIconView,
                        "registerBtn"  : registerBtn] as [String : Any]
        let metrics = ["spacing" : -35]
        addConstraints(NSLayoutConstraint.constraints(
            withVisualFormat: "H:|-0-[maskIconView]-0-|",
            options: [],
            metrics: nil,
            views: viewDict))
        addConstraints(NSLayoutConstraint.constraints(
            withVisualFormat: "V:|-0-[maskIconView]-(spacing)-[registerBtn]",
            options: [],
            metrics: metrics,
            views: viewDict))
        
    }
    
}
